This textbook on international relations, originally published in 1971 has been continuously in print ever since. Theories, models, methods of analysis have been pouring forth in recent years. The undergraduate lacks a guide through the jungle. This book does not pretend to provide a comprehensive guide. Its purpose is to elaborate some of the approaches which the author has found most helpful. The early chapters are concerned with states, what they are and how and why actions are taken on their behalf. This is one part - perhaps the major part - of what may be called micro-analysis. The later chapters offer an elementary introduction to some problems of macro-theory, using mainly the tools of systems analysis. The third edition of this book incorporates revisions of two kinds. In the first place, while the argument of Parts 1-3 remains largely unaltered, many of the illustrations have been updated. Particular note has been taken of recent changes in the role of the United Nations, of developments of the European Community, and of the profound effects of the collapse of the so-called communist regimes in the former Soviet Union and in the eastern Europe.
It also introduces students to methodology of international relations. Secondly, the fourth Part added in 1980 has been divided into two chapters, the second of these being extensively rewritten to reflect developments in theory in the past decade.